Index: configure.ac
===================================================================
--- configure.ac	(revision 142)
+++ configure.ac	(working copy)
@@ -80,15 +80,17 @@
                         [Define if you have the 'pwrite' function]))
 
 AX_C___ATTRIBUTE__
-# We only care about these two attributes.
+# We only care about these attributes.
 if test x"$ac_cv___attribute__" = x"yes"; then
   ac_cv___attribute___noreturn="__attribute__ ((noreturn))"
   ac_cv___attribute___noinline="__attribute__ ((noinline))"
   ac_cv___attribute___printf_4_5="__attribute__((__format__ (__printf__, 4, 5)))"
+  ac_cv___attribute___unused="__attribute__ ((unused))"
 else
   ac_cv___attribute___noreturn=
   ac_cv___attribute___noinline=
   ac_cv___attribute___printf_4_5=
+  ac_cv___attribute___unused=
 fi
 
 AX_C___BUILTIN_EXPECT
@@ -214,6 +216,7 @@
 AC_SUBST(ac_cv___attribute___noreturn)
 AC_SUBST(ac_cv___attribute___noinline)
 AC_SUBST(ac_cv___attribute___printf_4_5)
+AC_SUBST(ac_cv___attribute___unused)
 AC_SUBST(ac_cv_have___builtin_expect)
 AC_SUBST(ac_cv_have_stdint_h)
 AC_SUBST(ac_cv_have_systypes_h)
Index: src/glog/logging.h.in
===================================================================
--- src/glog/logging.h.in	(revision 142)
+++ src/glog/logging.h.in	(working copy)
@@ -908,8 +908,10 @@
 struct CrashReason;
 }  // namespace glog_internal_namespace_
 
+#define GOOGLE_GLOG_ATTRIBUTE_UNUSED @ac_cv___attribute___unused@
+
 #define GOOGLE_GLOG_COMPILE_ASSERT(expr, msg) \
-  typedef @ac_google_namespace@::glog_internal_namespace_::CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
+  typedef @ac_google_namespace@::glog_internal_namespace_::CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1] GOOGLE_GLOG_ATTRIBUTE_UNUSED
 
 #define LOG_EVERY_N(severity, n)                                        \
   GOOGLE_GLOG_COMPILE_ASSERT(@ac_google_namespace@::GLOG_ ## severity < \